Vanguard as the Royal Navy's most dangerous gunship

What was the most dangerous warship the Royal Navy ever built?

Vanguard, if danger is measured by combat lethality, because radar-guided 15-inch guns were exceptionally formidable.

Vanguard is the choice when danger means the ability to destroy an enemy. Her 15-inch guns delivered heavy striking power while radar supplied accurate fire-control information. That combination would make a gun duel punishing even for a modern foreign battleship. The hypothetical encounter distinguishes combat lethality from other meanings of a ship being dangerous.